Speed-dependent Voigt Lineshape Parameter Database Using Dual Frequency Comb Laser Absorption Measurements Of Pure And Air-broadened H₂o From 6656-7540 Cm^−1 Up To 1100 K

Egbert, Scott C

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https://hdl.handle.net/2142/111123 Copy

Description

Title

Speed-dependent Voigt Lineshape Parameter Database Using Dual Frequency Comb Laser Absorption Measurements Of Pure And Air-broadened H₂o From 6656-7540 Cm⁻¹ Up To 1100 K

Author(s)

Egbert, Scott C

Contributor(s)

• Rieker, Gregory B
• Drouin, Brian
• Coburn, Sean
• Sung, Keeyoon
• Yun, David
• Malarich, Nathan A

Issue Date

2021-06-22

Keyword(s)

Linelists

Abstract

We present broadband dual frequency comb laser measurements of pure and air-broadened H$_{2}$O absorption from 6656 to 7540 cm$^{-1}$ (1326-1502 nm) with a spectral point spacing of 0.0068 cm$^{-1}$. Sample pressure and temperature were carefully controlled for each of the 56 datasets collected, with measured temperatures between 300 and 1100 K and pressures ranging from 0.5 to 16 Torr and 20 to 600 Torr for the pure H$_{2}$O and 2\% H$_{2}$O in air, respectively. We employ a multispectrum fitting routine based on the quadratic speed-dependent Voigt profile to extract self- and air-broadening and shift parameters, along with corresponding power-law temperature dependence exponents for the thousands of visible absorption features. These results are then compared against existing high temperature H$_{2}$O linelists. \vspace{-2mm} \begin{center} \includegraphics[scale=0.78]{mini.eps} \end{center} \vspace{-15mm}

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

Text

Language

eng

Permalink

http://hdl.handle.net/2142/111123

DOI

10.15278/isms.2021.TF07

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